BELLTOWER, MONTANA

Average Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		5.6		-7.4		-4		0.4		5.6		10.4		15		19		18.5		12.6		6.3		-1.8		-7.1

Average High Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		-13.3		2.3		7		12.8		18		23.4		28.7		28.3		21.5		14.3		4.6		-0.8		12.8

Highest Recorded Temperature

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
C		32.3		4.8		8.8		13.2		19.2		22.3		29.4		32		32.3		26.7		18.6		12.4		5.3

Average Precipitation

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		347		12		12		18		31		60		66		42		30		28		22		13		12

Average Number of Days With Precipitation

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		52		3		3		4		5		7		7		6		4		4		3		3		3

Most Reported Precipitation in a Month

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		212		45		50		54		118		212		152		128		102		147		99		65		58

Least Reported Precipitation in a Month

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		---		---		---		1		---		9		---		---		---		---		---		---		---

Most Precipitation Reported in a Day

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
mm		101.6		21.1		17.8		30.7		53.1		101.6		75.4		46.5		50.5		63		52.3		56.6		18.8

Avg. No. of Days w/Precip. Above 0.1in/2.5mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		35		1.6		1.4		2.1		3.3		5.4		5.4		4.6		2.6		3.1		2.3		1.6		1.6

Avg. No. of Days w/Precip. Above 0.2in/5mm

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		36		2		2		2		3		6		5		4		3		3		2		2		2

Avg. # of Days w/Precip. Above 0.4in/10mm

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8		---		---		---		1		1		2		1		1		1		1		---		---

Avg. No. of Days w/Precip. Above 0.5in/13mm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		8		0.2		---		0.3		0.8		1.5		1.8		1.2		0.6		0.8		0.6		0.1		0.1

Average Snowfall

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		75.4		13.2		12.9		15		8.6		1.3		---		---		---		---		2.5		8.9		12.9

Average Number of Days With Snow

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9.7		2.1		1.3		2.3		0.7		0.1		---		---		---		---		0.4		1		1.8

Most Snow Reported in a Month

Years on Record: 62

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
cm		101.6		66		53.3		63.5		101.6		27.9		---		---		---		5.1		30.5		71.1		69.1

Avg. No. of Days w/Snow Above 1in/2.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		9.2		2		1.3		2.2		0.7		0.1		---		---		---		---		0.4		0.9		1.6

Avg. No. of Days w/Snow Above 3in/7.5cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		3.3		0.7		0.4		0.8		0.3		0.1		---		---		---		---		0.1		0.5		0.4

Avg. No. of Days w/Snow Above 5in/12.7cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		1.2		0.2		0.1		0.3		0.3		0.1		---		---		---		---		0.1		---		0.1

Avg. No. of Days w/Snowfall Above 10in/25cm

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		0.1		---		---		---		0.1		---		---		---		---		---		---		---		---

Heating Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		4765.6		799.4		625		553.9		381.7		246.1		115		44.4		52.8		181.1		374.4		605		786.7

Cooling Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		143.9		---		---		---		---		0.6		13.9		64.4		57.2		7.8		---		---		---

Growing Degree Days

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Days		783		---		---		---		---		13.8		150		279		263.5		76.7		---		---		---

Average Length of Day

Years on Record: 30

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Hours		12.8		9.7		11		12.5		14.1		15.5		16.3		15.9		14.6		13		11.4		10		9.3

Average Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.1		5.5		8.8		12.7		17.4		20.8		23		23.7		20.3		15.3		10.2		6.2		4.8

Average Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.2		3.2		4.5		6.3		7		8.8		9.3		9.1		8		6.7		4.9		3.5		2.8

Average Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.6		9.7		13.2		15.7		18.2		19.1		20		21.1		20.1		17.6		13.9		10.2		8.2

Average Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		15.5		8.3		11.7		13.7		18.6		19.9		22.1		23.8		21.1		16.9		13.1		9		7.5

Maximum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		14.1		5.5		8.8		12.7		17.4		20.8		23		23.7		20.3		15.3		10.2		6.2		4.8

Maximum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		6.5		3.4		4.8		6.5		7.5		8.9		9.8		9.4		8.3		7.1		5.3		3.9		3.1

Maximum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		17.8		10.6		15.1		17.2		22.3		21.4		23.3		22.9		22.3		20.2		15.8		12.2		9.9

Maximum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		18.4		9.2		13.9		16		24.2		23.8		27.6		26.6		24.2		20.1		15.1		11.3		9.2

Minimum Daily Solar Radiation - Global

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		11.2		4.9		7		9.8		14.8		15.2		19.4		17.8		17.1		11.3		8.3		4.9		3.8

Minimum Daily Solar Radiation - Diffuse

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		5.8		2.9		3.8		5.7		6.6		8.7		9.2		8.9		7.9		6		4.2		2.9		2.4

Minimum Daily Solar Radiation - Reflected

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		12.2		8.3		10.3		11.8		15.3		13.8		16.9		15.8		16.7		12.4		11		7.6		6.4

Minimum Daily Solar Radiation - Direct

Years on Record: 22

		ANNUAL		JAN		FEB		MAR		APR		MAY		JUN		JUL		AUG		SEP		OCT		NOV		DEC
Mj/m2		10.6		7		8.7		8.8		14.5		10.4		16.1		13.9		15.5		10.3		10		6.3		5.5